p {
    color: brown;
    background-color: cornsilk;

    font-family: Georgia;
    font-size: 14pt;
    font-weight: bold;
    font-style: italic;
}

blockquote {
    text-align: left; /* 行内容对齐 */
    text-indent: 5%; /* 首行缩进 */
}

body {
    background-image: url(src/background.jpg);
}

ol {
    list-style-type: lower-roman;
}

/* ID选择器 */
#grade {
    list-style-type: upper-roman;
}

/* 类选择器 */
p.question {
    background-color: ivory;
    color: darkorange;
}

/* 伪类选择器 */
p.question:hover {
    background-color:darkslategray;
    color:lightblue;
}